了解它为什么在那里很重要，其原因是about属性定义“主语-谓语-宾语”三元组中的主语。
It's important to know why it's there: the about attribute defines the subject in that subject-predicate-object triple concept I mentioned previously.
了解它为什么在那里很重要，其原因是about属性定义“主语-谓语-宾语”三元组中的主语。
It's important to know why it's there: the about attribute defines the subject in that subject-predicate-object triple concept I mentioned previously.
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